Onninu Purake Mattonnu (1988)

Embedded with charged emotions and scintillating suspense, this offbeat thriller follows the life of a wealthy man, whose wife, Geetha mysteriously disappears. Automatically, he becomes the prime suspect of the police, as they investigate into a possible murder. Deeply hurt by the accusation of being his wife's murderer, he offers to provide employment to Vinod, an empathetic stranger, as an objective observer, who can also help him prove his innocence. Vinod finds out that he lives in the house with a mentally challenged brother, Omanakuttan and a younger sister, Shruti. When the whole family love the Geetha so completely, how and why did she disappear? What is Vinod's true identity and what are his motives for helping the family?